Question

Starting from rest, a 12-cm-diameter compact disk takes 2.7 s to reach its operating angular velocity...

Starting from rest, a 12-cm-diameter compact disk takes 2.7 s to reach its operating angular velocity of 2300 rpm . Assume that the angular acceleration is constant. The disk's moment of inertia is 2.5×10−5kgm2.

Part A) How much torque is applied to the disk?

Part B) How many revolutions does it make before reaching full speed?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Starting from rest, a 12-cm-diameter compact disk takes 3.2 s to reach its operating angular velocity...
Starting from rest, a 12-cm-diameter compact disk takes 3.2 s to reach its operating angular velocity of 2500 rpm . Assume that the angular acceleration is constant. The disk's moment of inertia is 2.5×10−5kgm2. How much torque is applied to the disk? How many revolutions does it make before reaching full speed?
1. Starting from rest, a CD takes 3.0 s to reach its operating angular velocity of...
1. Starting from rest, a CD takes 3.0 s to reach its operating angular velocity of 450 rpm. The mass of a CD is 17 g and its diameter is 12 cm. You may assume that the small opening at the center of the CD is unimportant when calculating the rotational inertia. Assume that the angular acceleration is constant. a. What is the rotational kinetic energy of the CD after it has completely spun up? b. How high off the...
A uniform disk has a mass of 9 kg and a radius of 20 cm. It...
A uniform disk has a mass of 9 kg and a radius of 20 cm. It completes 15 revolutions in 11 seconds when starting from rest. (12 points) a. Find the angular acceleration of the disk. b. Find the moment of inertia of the disk. c. Find the net torque on the disk.
A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration....
A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 11.0 rev/s; 35.0 revolutions later, its angular speed is 21.0 rev/s. Calculate (a) the angular acceleration (rev/s2), (b) the time required to complete the 35.0 revolutions, (c) the time required to reach the 11.0 rev/s angular speed, and (d) the number of revolutions from rest until the time the disk reaches the 11.0 rev/s angular speed.
a flywheel of diameter 37.5 cm starts from rest and accelerates to an angular velocity of...
a flywheel of diameter 37.5 cm starts from rest and accelerates to an angular velocity of 900 rpm in 5.38 seconds. find the magnitude of the total acceleration at 1.62 seconds.
A compact disk, which has a diameter of 12.0 cm, speeds up uniformly from zero to...
A compact disk, which has a diameter of 12.0 cm, speeds up uniformly from zero to 4.20 rev/s in 2.90s. (A) What is the tangential acceleration of a point on the outer rim of the disk at the moment when its angular speed is 2.00 rev/s ? (B) What is the tangential acceleration of a point on the outer rim of the disk at the moment when its angular speed is 3.00 rev/s?
Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 2.00...
Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 2.00 s, it rotates 44.3 rad. During that time, what are the magnitudes of (a) the angular acceleration and (b) the average angular velocity? (c) What is the instantaneous angular velocity of the disk at the end of the 2.00 s? (d) With the angular acceleration unchanged, through what additional angle (rad) will the disk turn during the next 2.00 s?
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is...
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 700 rad/s2 for 12s, then coasts at a steady angular velocity for another 12s. What is the speed of the dot at t = 1.0 s? Through how many revolutions has it turned?
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is...
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 630 rad/s 2   for 1 2  s , then coasts at a steady angular velocity for another 1 2  s . Part A What is the speed of the dot at t = 1.0 s ? Express your answer to two significant figures and include the appropriate units. Part B Through how many revolutions has...
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is...
A computer hard disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 510 rad/s2 for 12s, then coasts at a steady angular velocity for another 12s. What is the speed of the dot at t = 1.0 s? Express your answer to two significant figures and include the appropriate units. Through how many revolutions has it turned? Express your answer using two significant figures.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT